Link dataconnect package and add invoice hub

Wire up the dataconnect-generated package for the web app and add a new `hub` field to invoice mutations and queries. Updates include: add package links in apps/web package and workspace config, adjust connector.yaml JavaScript SDK output/package paths, add `hub` to invoice create/update mutations and to invoice queries, remove many example dataconnect GraphQL files and the web README, and minor formatting/newline fixes (Makefile and several .gql files).

backend/dataconnect/connector/invoice/queries.gql

@@ -18,6 +18,7 @@ query listInvoices(
     invoiceNumber
     issueDate
     dueDate
+    hub
     managerName
     vendorNumber
     roles
@@ -78,6 +79,7 @@ query getInvoiceById($id: UUID!) @auth(level: USER) {
     invoiceNumber
     issueDate
     dueDate
+    hub
     managerName
     vendorNumber
     roles
@@ -147,6 +149,7 @@ query listInvoicesByVendorId(
     invoiceNumber
     issueDate
     dueDate
+    hub
     managerName
     vendorNumber
     roles
@@ -216,6 +219,7 @@ query listInvoicesByBusinessId(
     invoiceNumber
     issueDate
     dueDate
+    hub
     managerName
     vendorNumber
     roles
@@ -285,6 +289,7 @@ query listInvoicesByOrderId(
     invoiceNumber
     issueDate
     dueDate
+    hub
     managerName
     vendorNumber
     roles
@@ -354,6 +359,7 @@ query listInvoicesByStatus(
     invoiceNumber
     issueDate
     dueDate
+    hub
     managerName
     vendorNumber
     roles
@@ -442,6 +448,7 @@ query filterInvoices(
     invoiceNumber
     issueDate
     dueDate
+    hub
     managerName
     vendorNumber
     roles
@@ -515,6 +522,7 @@ query listOverdueInvoices(
     invoiceNumber
     issueDate
     dueDate
+    hub
     managerName
     vendorNumber
     roles